/*
 * Copyright (c) 2021, 2021, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.oracle.svm.jfr;

import org.graalvm.nativeimage.Platform;
import org.graalvm.nativeimage.Platforms;

import com.oracle.svm.core.SubstrateOptions;
import com.oracle.svm.core.annotate.Uninterruptible;

/**
 * Repository that collects all metadata about stacktraces.
 */
public class JfrStackTraceRepository implements JfrConstantPool {

    private int depth = SubstrateOptions.MaxJavaStackTraceDepth.getValue();

    @Platforms(Platform.HOSTED_ONLY.class)
    JfrStackTraceRepository() {
    }

    public void teardown() {
    }

    @Uninterruptible(reason = "Epoch must not change while in this method.")
    public long getStackTraceId(@SuppressWarnings("unused") int skipCount, @SuppressWarnings("unused") boolean previousEpoch) {
        assert depth >= 0;
        return 0;
    }

    public void setStackTraceDepth(int depth) {
        if (depth < 0 || depth > SubstrateOptions.MaxJavaStackTraceDepth.getValue()) {
            throw new IllegalArgumentException("StackTrace depth (" + depth + ") is not in a valid range!");
        }
        this.depth = depth;
    }

    @Override
    public int write(@SuppressWarnings("unused") JfrChunkWriter writer) {
        return EMPTY;
    }
}
